Note: Descriptions are shown in the official language in which they were submitted.
1
CLUTCH DEVICE, DRILL CHUCK, POWER TOOL, AND BIDIRECTIONAL ROTATION
METHOD OF DRILL CHUCK
Cross-reference to Related Application
The present disclosure claims the priority to the Chinese patent application
with the filing number
2019103515375 filed on April 28, 2019 with the Chinese Patent Office, and
entitled "Clutch
Device, Drill Chuck, Power Tool, and Bidirectional Rotation Method of Drill
Chuck".
Technical Field
The present disclosure relates to the technical field of drill chucks, in
particular to a clutch device,
a drill chuck, a power tool, and a bidirectional rotation method of the drill
chuck.
Background Art
When the self-tightening drill chucks currently on the market suddenly start
in a vibration working
state or in an idling state, and a rotating direction of the idling is a
direction of loosening a drilling
tool, the drilling tool tends to get loose, and even the drilling tool is
caused to detach from the drill
chuck.
Summary
The present disclosure aims at providing a clutch device, a drill chuck, a
power tool, and a
bidirectional rotation method of the drill chuck, so as to solve the technical
problems existing in
.. the prior art that when the self-tightening drill chucks suddenly start in
a vibration working state or
in an idling state and a rotating direction of the idling is a direction of
loosening a drilling tool, the
drilling tool tends to get loose and even the drilling tool is caused to
detach from the drill chuck.
The present disclosure provides a clutch device, which includes a return
elastic member, a
transmission assembly, and a rotating portion; the transmission assembly
includes at least two
oppositely arranged engagement portions, one of the engagement portions can
rotate in
synchronization with a front body of the drill chuck, and the other one of the
engagement portions
can rotate in synchronization with a rear body of the drill chuck; engagement
between the two
engagement portions can enable the front body and the rear body to rotate in
synchronization;
rotation of the rotating portion in a first direction can enable the return
elastic member to be
compressed, so as to disengage the two engagement portions from each other;
and rotation of
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the rotating portion in the second direction can enable the compressed return
elastic member to
return to an initial position, so as to make the two engagement portions
engaged with each other.
Optionally, engagement or disengagement between the two engagement portions is
realized
through a tooth structure, the engagement portions may be of a sheet
structure, the tooth structure
includes a plurality of teeth provided on a sheet surface of the sheet
structure, and the plurality of
teeth are distributed in a circular shape on the sheet surface.
Optionally, the clutch device further includes a rear sleeve, the rear sleeve
is configured for fixed
connection with the rear body, and the connection between the rear sleeve and
the rear body
may be interference fit or key connection.
Optionally, a trigger is further included, wherein rotation of the rotating
portion can enable the
trigger to push one of the engagement portions to move, so that the return
elastic member can
be compressed or return to the initial position.
Optionally, the return elastic member is located outside one of the engagement
portions, and
inner sides of the two engagement portions are opposite to each other.
Optionally, the number of engagement portions is two, and the two engagement
portions are a
first engagement portion and a second engagement portion, respectively;
the return elastic member is located outside the second engagement portion,
and the second
engagement portion is located between the return elastic member and the first
engagement
portion; alternatively, the return elastic member is located outside the first
engagement portion,
and the first engagement portion is located between the return elastic member
and the second
engagement portion.
Optionally, when the return elastic member is located outside the second
engagement portion,
the first engagement portion and the front body are fixedly connected with
each other, and the
second engagement portion can move along an axial direction of the rear body.
Optionally, the trigger includes a lever; rotation of the rotating portion in
the first direction can
enable the lever to pry the second engagement portion so as to make the second
engagement
portion move along the axial direction of the rear body, so that the first
engagement portion and
the second engagement portion are disengaged from each other.
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Optionally, the trigger further includes a connecting rod fixed on the
rotating portion, the
connecting rod extends along an axial direction of the rotating portion, and
the connecting rod is
provided with a contact (contact head); the lever includes a first raised
portion and a second raised
portion connected to the first raised portion, and the first raised portion
and the second raised
portion are arranged with an angle therebetween.
Optionally, the lever is rotatably mounted in a circumferential direction of
the first engagement
portion through a pin shaft; the rotating portion is of a sleeve-shaped
structure, and an inner
surface of the sleeve-shaped structure is provided with a protruding block
configured to push the
lever to rotate around the pin shaft.
Optionally, the first engagement portion is provided with positioning holes,
and the lever includes
an insertion portion and a prying portion; a length extending direction of the
insertion portion and
a length extending direction of the prying portion have an angle therebetween,
the insertion
portion is inserted into the corresponding positioning hole, the rotating
portion is of a sleeve-
shaped structure, and an inner surface of the sleeve-shaped structure is
provided with the
.. protruding block configured to push the insertion portion to sway in the
positioning hole, so as to
enable the prying portion to move,
Optionally, when the return elastic member is located outside the first
engagement portion, the
first engagement portion can move along an axial direction of the front body,
and the second
engagement portion is fixedly connected to the rear body.
Optionally, the trigger includes a connecting rod fixed on the rotating
portion, the connecting rod
extends along the axial direction of the rotating portion, and the connecting
rod is provided with a
contact; a surface of the first engagement portion is provided with a contact
socket; and the
contact can enter or leave the contact socket along with the rotation of the
rotating portion.
Optionally, the trigger includes a follower portion and a connecting rod fixed
on the follower
portion, the connecting rod extends along an axial direction of the follower
portion, and the
connecting rod is provided with a contact: the follower portion and the
rotating portion are in
threaded transmission; a link guide groove is provided in the circumferential
direction of the front
body for enabling the connecting rod to move along a length extending
direction of the link guide
groove.
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Optionally, the trigger includes a lever; rotation of the rotating portion in
the first direction can
enable the lever to pry the first engagement portion so as to make the first
engagement portion
move along the axial direction of the rear body, so that the first engagement
portion and the
second engagement portion are disengaged from each other.
Optionally, the first engagement portion is provided with positioning holes,
and the lever includes
an insertion portion and a prying portion; a length extending direction of the
insertion portion and
a length extending direction of the prying portion are provided with an angle,
the insertion portion
is inserted into the corresponding positioning hole, the rotating portion is
of a sleeve-shaped
structure, and an inner surface of the sleeve-shaped structure is provided
with the protruding
block configured to push the insertion portion to sway in the positioning
hole, so as to enable the
prying portion to move.
The present disclosure further provides a drill chuck, which includes a front
body, a rear body, at
least one clamping jaw, and the clutch device; the rear body can rotate
relative to the front body,
so as to enable the rear body to drive the at least one clamping jaw to move
to clamp or loosen a
drilling tool mounted on the drill chuck; one of the engagement portions is
connected to the front
body, and the other one of the engagement portions is connected to the rear
body.
The present disclosure further provides a power tool, which includes a driving
shaft and the drill
chuck; and the driving shaft is connected to the rear body for driving the
rear body to rotate.
The present disclosure further provides a bidirectional rotation method of a
drill chuck, wherein
.. the drill chuck includes a rear body, a front body, and at least one
clamping jaw, the method
includes: enabling the rear body to rotate relative to the front body, so that
the rear body can drive
the at least one clamping jaw to move; providing a clutch device between the
rear body and the
front body, so as to make the rear body engaged with or disengaged from the
front body, wherein
the clutch device includes a return elastic member, a transmission assembly,
and a rotating
portion; the transmission assembly includes at least two oppositely arranged
engagement
portions, wherein one of the engagement portions can rotate in synchronization
with the front
body of the drill chuck, and the other one of the engagement portions can
rotate in synchronization
with the rear body of the drill chuck; engagement between the two engagement
portions can
enable the front body and the rear body to rotate in synchronization; rotation
of the rotating portion
in a first direction can enable the return elastic member to be compressed, so
as to make the two
engagement portions disengaged from each other; and rotation of the rotating
portion in the
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second direction can enable the compressed return elastic member to return to
an initial position,
so as to make the two engagement portions engaged with each other.
Compared with the prior art, beneficial effects of the present disclosure are
as follows.
Regarding the clutch device, the drill chuck, the power tool, and the
bidirectional rotation method
5 of the drill chuck provided in the present disclosure, it is convenient
to realize engagement or
disengagement between the two oppositely arranged engagement portions through
a rotating
operation of the rotating portion, in this way, when one of the engagement
portions is configured
to be rotatable in synchronization with the front body of the drill chuck, and
the other of the
engagement portions is configured to be rotatable in synchronization with the
rear body of the drill
chuck, the engagement or disengagement between the front body and the rear
body can be
realized by just rotating the rotating portion, thus when the front body and
the rear body are in an
engagement state, it is advantageous to ensure the drilling tool on the drill
chuck to have mounting
stability when the drill chuck suddenly starts in a vibration working state or
in an idling state, and
avoid the occurrence of loosening or detachment. Besides, through the
engagement between the
.. front body and the rear body, the bidirectional rotation of the drill chuck
is further realized, so as
to drive the drilling tool to perform bidirectional operation, and the
drilling tool may be replaced
more reliably, easily, simply, and conveniently.
Brief Description of Drawings
In order to more clearly illustrate technical solutions in specific
embodiments of the present
.. disclosure or the prior art, accompanying drawings which need to be used
for description of the
specific embodiments or the prior art will be introduced briefly below.
Apparently, the
accompanying drawings in the description below merely show some embodiments of
the present
disclosure, and those ordinarily skilled in the art still could obtain other
accompanying drawings
in light of these drawings, without paying creative efforts.
FIG. 1 is an assembled view of a gear self-tightening drill chuck provided in
an embodiment of
the present disclosure (a rear sleeve is not installed);
FIG. 2 is a structural schematic view of the gear self-tightening drill chuck
in FIG. 1 from another
perspective;
FIG. 3 is a sectional view along a line A-A in FIG. 2;
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FIG. 4 is a structural schematic view of a front body of the gear self-
tightening drill chuck in FIG.
1;
FIG. 5 is a structural schematic view of a rotating portion of a clutch device
in FIG. 1;
FIG. 6 is a structural schematic view of a second engagement portion of the
clutch device in FIG.
1;
FIG. 7 is a structural schematic view of a lever of the clutch device in FIG.
1;
FIG. 8 is an explosive view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure;
FIG. 9 is an explosive view of a flat jaw self-tightening drill chuck provided
in an embodiment of
the present disclosure;
FIG. 10 is an assembled view of the flat jaw self-tightening drill chuck
provided in an embodiment
of the present disclosure (a rear sleeve is not installed);
FIG. 11 is an assembled view of an internal thread self-tightening drill chuck
provided in an
embodiment of the present disclosure (a rear sleeve is not installed);
FIG. 12 is an explosive view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure;
FIG. 13 is a sectional view of the gear self-tightening drill chuck provided
in an embodiment of the
present disclosure;
FIG. 14 is an assembled view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure (a rear sleeve is not installed);
FIG. 15 is a structural schematic view of a lever of the clutch device in FIG.
12;
FIG. 16 is an assembled view of the flat jaw self-tightening drill chuck
provided in an embodiment
of the present disclosure (a rear sleeve is not installed);
FIG. 17 is an explosive view of the flat jaw self-tightening drill chuck
provided in an embodiment
of the present disclosure;
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FIG. 18 is an explosive view of the internal thread self-tightening drill
chuck provided in an
embodiment of the present disclosure;
FIG. 19 is an assembled view of the internal thread self-tightening drill
chuck provided in an
embodiment of the present disclosure (a rear sleeve is not installed);
FIG. 20 is an assembled view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure (a rear sleeve is not installed);
FIG. 21 is a sectional view of the gear self-tightening drill chuck provided
in an embodiment of the
present disclosure;
FIG. 22 is a structural schematic view of the lever of the clutch device in
FIG. 20;
FIG. 23 is an explosive view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure;
FIG. 24 is an explosive view of the flat jaw self-tightening drill chuck
provided in an embodiment
of the present disclosure;
FIG. 25 is an assembled view of the flat jaw self-tightening drill chuck
provided in an embodiment
is of the present disclosure (a rear sleeve is not installed);
FIG. 26 is an assembled view of the internal thread self-tightening drill
chuck provided in an
embodiment of the present disclosure (a rear sleeve is not installed);
FIG. 27 is an explosive view of the internal thread self-tightening drill
chuck provided in an
embodiment of the present disclosure;
FIG. 28 is an explosive view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure;
FIG. 29 is an assembled view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure (a sleeve body is not installed);
FIG. 30 is a sectional view of the gear self-tightening drill chuck provided
in an embodiment of the
present disclosure;
FIG. 31 is a structural schematic view of a second engagement portion of the
clutch device in
FIG. 28;
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FIG. 32 is a sectional view of the gear self-tightening drill chuck provided
in an embodiment of the
present disclosure;
FIG. 33 is a structural schematic view of a second engagement portion of the
clutch device in
FIG. 33;
FIG. 34 is an explosive view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure;
FIG. 35 is an explosive view of the flat jaw self-tightening drill chuck
provided in an embodiment
of the present disclosure;
FIG. 36 is a sectional view of the flat jaw self-tightening drill chuck
provided in an embodiment of
the present disclosure;
FIG. 37 is a sectional view of the internal thread self-tightening drill chuck
provided in an
embodiment of the present disclosure;
FIG. 38 is an explosive view of the internal thread self-tightening drill
chuck provided in an
embodiment of the present disclosure;
FIG. 39 is an explosive view of the gear self-tightening drill chuck provided
in an embodiment of
the present disclosure;
FIG. 40 is a sectional view of the gear self-tightening drill chuck provided
in an embodiment of the
present disclosure;
FIG. 41 is a structural schematic view of the rotating portion of the clutch
device in FIG. 39;
FIG. 42 is a structural schematic view of a fixing sleeve of the gear self-
tightening drill chuck in
FIG. 39;
FIG. 43 is a structural schematic view of the second engagement portion of the
clutch device in
FIG. 39;
FIG. 44 is a schematic view of a first state in which the fixing sleeve
cooperates with the rotating
portion in FIG. 39;
FIG. 45 is a schematic view of a second state in which the fixing sleeve
cooperates with the
rotating portion in FIG. 39;
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FIG. 46 is a sectional view of the internal thread self-tightening drill chuck
provided in an
embodiment of the present disclosure;
FIG. 47 is an explosive view of the internal thread self-tightening drill
chuck provided in an
embodiment of the present disclosure; and
.. FIG. 48 is an explosive view of the internal thread self-tightening drill
chuck provided in an
embodiment of the present disclosure (a rear sleeve is not installed).
Reference signs:
100-rear body; 101-front body; 102-clamping jaw; 103-clamping jaw slideway;
105-driven bevel
gear; 108-driving bevel gear; 111-screw; 115-front end; 116-rear end; 118-
return spring; 121-rear
sleeve; 126-end cap; 127-drilling tool receiving hole; 132-inner side surface;
133-strip-shaped
groove; 134-positioning key; 201-first engagement portion; 202-second
engagement portion; 203-
rotating portion; 204-contact; 205-connecting rod; 206-tooth; 208-lever; 209-
rotation convex strip;
210-rotation groove; 216-return elastic member; 217-driving portion; 220-first
raised portion; 221-
second raised portion; 222-accommodating groove; 223-spring groove; 224-shaft
shoulder; 225-
pin shaft; 226-avoiding groove; 227-pin hole; 228-main body portion; 229-
additional portion; 231-
protruding block; 232-insertion portion; 233-prying portion; 234-positioning
hole; 235-contact
socket; 236-first arc surface; 301-disc portion; 302-axial convex portion; 303-
internal thread; 304-
external thread; 305-fixing sleeve; 306-first arc protrusion; 307-second arc
protrusion; 308-
triangular structure; 309-sleeve body; 310-follower portion.
Detailed Description of Embodiments
Technical solutions of the present disclosure will be described below clearly
and completely in
connection with accompanying drawings. Apparently, the embodiments described
are only some
but not all embodiments of the present disclosure. All of other embodiments
obtained by those
ordinarily skilled in the art based on the embodiments in the present
disclosure without using
creative efforts shall fall within the scope of protection of the present
disclosure. In the description
of the present disclosure, it should be indicated that orientation or
positional relations indicated
by terms "center", "upper", "lower", "left", "right", "vertical",
"horizontal", "inner", "outer" and so on
are based on orientation or positional relations as shown in the accompanying
drawings, merely
for facilitating the description of the present disclosure and simplifying the
description, rather than
indicating or implying that related devices or elements have to be in the
specific orientation or
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configured and operated in a specific orientation, therefore, they should not
be construed as
limiting the present disclosure. Besides, terms "first", "second", and "third"
are merely for
descriptive purpose, but should not be construed as indicating or implying
importance in the
relativity. In the description of the present disclosure, it should be
indicated that unless otherwise
5 specified and defined explicitly, terms "mount", "link", "connect" should
be construed in a broad
sense. For example, it may be fixed connection, detachable connection, or
integral connection; it
may be mechanical connection; it may be direct linking, indirect linking via
an intermediate
medium, or inner communication between two elements. For those ordinarily
skilled in the art,
specific meanings of the above-mentioned terms in the present disclosure could
be understood
1.0 according to specific circumstances.
Referring to FIG. 1 to FIG. 48, an embodiment of the present disclosure
provides a clutch device,
wherein the clutch device may be applicable to a self-tightening drill chuck,
and the self-tightening
drill chuck may be a gear self-tightening drill chuck, a flat jaw self-
tightening drill chuck, an internal
thread self-tightening drill chuck, or an external thread self-clamping drill
chuck. The clutch device
includes a return elastic member 216, a transmission assembly, and a rotating
portion 203; the
transmission assembly includes at least two oppositely arranged engagement
portions, wherein
one engagement portion can rotate in synchronization with a front body 101 of
the drill chuck, and
the other engagement portion can rotate in synchronization with a rear body
100 of the drill chuck;
the engagement between the two engagement portions can enable the front body
101 and the
rear body 100 to rotate in synchronization with each other; rotation of the
rotating portion 203 in
a first direction can enable the return elastic member 216 to be compressed,
so as to disengage
the two engagement portions from each other; rotation of the rotating portion
203 in the second
direction can enable the compressed return elastic member 216 to return to an
initial position, so
as to make the two engagement portions engaged with each other.
The operation principle of a gear self-tightening drill chuck comprises that a
driving bevel gear
108 on the rear body 100 drives a driven bevel gear 105 mounted on the front
body 101 to rotate,
and the rotation of the driven bevel gear 105 then drives clamping jaws 102 to
move along
corresponding clamping jaw slideways 103 on the front body 101, so as to
realize clamping or
loosening of a drilling tool inserted in a drilling tool receiving hole of the
front body 101.
The operation principle of a flat jaw self-tightening drill chuck comprises
that the rear body 100
drives a driving portion 217 having an external thread structure to rotate,
and the driving portion
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217 drives the clamping jaws 102 connected to the driving portion to move
along the
corresponding clamping jaw slideways 103 on the front body 101.
The operation principle of an internal thread self-tightening drill chuck
comprises that an external
thread structure of the driving portion 217 on the rear body 100 cooperates
with thread structures
on the clamping jaws 102 to realize transmission, in this way, when the rear
body 100 rotates, it
may be realized that the clamping jaws 102 move along the corresponding
clamping jaw
slideways 103 on the front body 101.
For example, the number of engagement portions is two. The return elastic
member 216 may be
a wave-shaped gasket, and the rotating portion 203 is of a sleeve-shaped
structure. When the
transmission assembly includes two oppositely arranged engagement portions,
the two
engagement portions can be engaged with or disengaged from each other, and the
two
engagement portions realize engagement or disengagement therebetween through a
tooth
structure. The engagement portions may be of a sheet structure, the tooth
structure refers to a
plurality of teeth 206 provided on a sheet surface of the sheet structure, and
the plurality of teeth
are distributed in a circular shape on the sheet surface. The teeth may be
retches. The first
direction is a loosening direction which is just a rotating direction of the
rotating portion 203 when
the drilling tool on the drill chuck can be loosened; and the second direction
is a clamping direction
which is just a rotating direction of the rotating portion 203 when the
drilling tool on the drill chuck
can be clamped. The two engagement portions are a first engagement portion 201
and a second
engagement portion 202, respectively. After the rotating portion 203 rotates
along the clamping
direction by a certain angle, the engagement between the second engagement
portion 202 and
the first engagement portion 201 is realized under the action of the return
elastic member 216 on
the second engagement portion 202, so as to prevent loosening the drilling
tool on the drill chuck;
after the rotating portion 203 rotates along the loosening direction by a
certain angle, the second
engagement portion 202 is disengaged from the first engagement portion 201, so
that the drilling
tool on the drill chuck is loosened. The return elastic member 216 is a wave-
shaped spring
washer. After the clamping jaws 102 of the drill chuck clamp the drilling tool
and when the drill
chuck is observed from an operation end (for example, when the drilling tool
is a drill bit, the
operation end of the drill bit can drill a hole in an object) of the drilling
tool towards a direction
where the drill chuck is located, counterclockwise rotation is forward
rotation of the drill chuck,
and clockwise rotation is reverse rotation of the drill chuck. The rear body
100 is rotated forward
with respect to the front body 101 so as to realize clamping of the drilling
tool by the clamping
jaws 102, and the rear body 100 is rotated reversely with respect to the front
body 101 so as to
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realize loosening of the drilling tool from the clamping jaws 102. A forward
rotating direction of the
rear body 100 and a forward rotating direction of the front body 101 are both
the same as a
forward rotating direction of the drill chuck; and a reverse rotating
direction of the rear body 100
and a reverse rotating direction of the front body 101 are both the same as a
reverse rotating
direction of the drill chuck. The rear body 100 can rotate about an axis of
the rear body 100 relative
to the front body 101, and the rear body 100 is provided coaxially with the
front body 101. A
clamping direction of the rotating portion 203 is the same as the reverse
rotating direction of the
drill chuck, and a loosening direction of a switch sleeve is the same as the
forward rotating
direction of the drill chuck. in this embodiment, the forward rotation of the
rear body 100 of the
drill chuck may realize clamping of the drilling tool by the clamping jaws
102, and the reverse
rotation of the rear body 100 may realize loosening of the drilling tool from
the clamping jaws 102;
after clamping the drilling tool with the clamping jaws 102 by rotating the
rear body 100 forward,
the conventional forward rotation may be realized, in this case, the rear body
100 and the front
body 101 rotate forward together; in cases where the clamping jaws 102 clamp
the drilling tool,
after the rear body 100 and the front body 101 are engaged with each other by
the clutch device,
a relatively stationary fixed connection state is realized by the clutch
device between the rear
body 100 and the front body 101, that is, the rear body 100 and the front body
101 rotate reversely
together, thus realizing bidirectional rotation of the drill chuck by the
clutch device, so as to drive
the drilling tool to perform bidirectional operation, and the user experience
is relatively good. It
should be noted that the return elastic member 216 further may be a spring or
the like, and a
material of the wave-shaped gasket may be a metal.
Optionally, the clutch device further includes a rear sleeve 121, wherein the
rear sleeve 121 is
configured for fixed connection with the rear body 100, and connection between
the rear sleeve
121 and the rear body 100 may be interference fit or key connection. In use,
the rear body 100
can be driven to rotate by rotating the rear sleeve 121.
For the clutch device provided in this embodiment, the engagement or
disengagement between
two oppositely arranged engagement portions is easily realized through the
rotating operation on
the rotating portion 203, in this way, after one of the engagement portions is
capable of rotating
in synchronization with the front body 101 of the drill chuck, and the other
engagement portion is
capable of rotating in synchronization with the rear body 100 of the drill
chuck, the engagement
or disengagement between the front body 101 and the rear body 100 can be
realized just by
rotating the rotating portion 203, thus when the front body 101 and the rear
body 100 are in an
engagement state, it is advantageous to ensure the mounting stability of the
drilling tool on the
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drill chuck if the drill chuck suddenly starts in a vibration working state or
in an idling state, and
avoid occurrence of loosening or detachment, in addition, bidirectional
rotation of the drill chuck
is also realized through the engagement between the front body 101 and the
rear body 100, so
as to drive the drilling tool to perform bidirectional operation.
Optionally, the clutch device further includes a trigger, and the rotation of
the rotating portion 203
can enable the trigger to push one of the engagement portions to move, so that
the return elastic
member 216 can be compressed or return to the initial position.
For example, when the clutch device is connected to the front body 101 and the
rear body 100 of
the drill chuck, the rotation of the rotating portion 203 can make the return
elastic member 216 to
be compressed or reset; and when the return elastic member 216 is compressed,
the two
oppositely arranged engagement portions can be disengaged from each other, and
when the
compressed return elastic member 216 returns to the initial position, the
engagement between
the two oppositely arranged engagement portions can be realized.
Optionally, the return elastic member 216 is located outside one of the
engagement portions, and
inner sides of the two engagement portions are opposite to each other. The
tooth structure is
located inside the engagement portions. The first engagement portion 201 and
the second
engagement portion 202 may be both of a sheet structure.
This embodiment further provides a bidirectional rotation method of a drill
chuck, wherein the drill
chuck includes a rear body 100, a front body 101, and clamping jaws 102, the
method includes:
making the rear body 100 to rotate relative to the front body 101, so that the
rear body 100 can
drive the clamping jaws 102 to move; providing a clutch device between the
rear body 100 and
the front body 101, so as to make the rear body 100 engaged with or disengaged
from the front
body 101, wherein the clutch device includes a return elastic member 216, a
transmission
assembly, and a rotating portion 203; the transmission assembly includes at
least two oppositely
arranged engagement portions, wherein one engagement portion can rotate in
synchronization
with the front body 101 of the drill chuck, and the other engagement portion
can rotate in
synchronization with the rear body 100 of the drill chuck; the engagement
between the two
engagement portions can enable the front body 101 and the rear body 100 to
rotate in
synchronization with each other; rotation of the rotating portion 203 in a
first direction can enable
the return elastic member 216 to be compressed, so as to make the two
engagement portions
disengaged from each other; rotation of the rotating portion 203 in the second
direction can enable
Date Recue/Date Received 2021-07-08
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14
the compressed return elastic member 216 to return to the initial position, so
as to make the two
engagement portions engaged with each other.
In an embodiment, the return elastic member 216 is located outside the second
engagement
portion 202, and the second engagement portion 202 is located between the
return elastic
member 216 and the first engagement portion 201, and the rear sleeve 121 is
further configured
to limit the return elastic member 216 so as to realize that the return
elastic member 216 can be
compressed or return to the initial position.
Optionally, when the return elastic member 216 is located outside the second
engagement portion
202, the first engagement portion 201 and the front body 101 are fixedly
connected with each
other via screws 111, the second engagement portion 202 can move along an
axial direction of
the rear body 100, a rear end 116 of the rear body 100 is circumferentially
provided with a strip-
shaped groove 133 extending along an axial direction of the rear end, the
second engagement
portion 202 is sleeved over the rear end 116 of the rear body 100, an inner
wall of an axial hole
of the second engagement portion 202 is provided with positioning keys 134
cooperating with the
strip-shaped groove 133 on the rear body 100, and the positioning keys 134 and
the hole wall of
the axial hole are of an integral structure, thus realizing that the rear body
100 and the second
engagement portion 202 are relatively fixed to each other in the
circumferential direction, and can
be displaced in the axial direction. The rear sleeve 121 is further configured
to limit the return
elastic member 216. By limiting the return elastic member 216 with the rear
sleeve 121, two
objectives may be achieved, wherein the first objective is to enable the
return elastic member 216
to be compressed; and the second objective is to enable the second engagement
portion 202 to
move in the direction towards the first engagement portion 201, when the
compressed return
elastic member 216 returns to the initial position, so as to achieve the
objective of engaging the
second engagement portion 202 with the first engagement portion 201. It should
be noted that
the rear body 100 and the second engagement portion 202 may also be connected
through a
special-shaped hole structure, so as to realize that the rear body 100 and the
second engagement
portion 202 are relatively fixed to each other in the circumferential
direction, and can be displaced
in the axial direction, wherein the special-shaped hole may be a waist round
hole, a square hole,
etc.
Referring to what is shown in FIG. Ito FIG. 11, and FIG. 48, in this
embodiment, the trigger
includes levers 208; the rotation of the rotating portion 203 in the first
direction can enable the
levers 208 to pry the second engagement portion 202 so as to make the second
engagement
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portion move along the axial direction of the rear body 100 (i.e., the levers
208 cause the second
engagement portion 202 to move in a direction away from the first engagement
portion 201), so
that the first engagement portion 201 and the second engagement portion 202
are disengaged
from each other. The rotation of the rotating portion 203 in the second
direction can enable the
5 return elastic member 216 to return to the initial position, and enable
the second engagement
portion 202 to move in a direction close to the first engagement portion 201,
so as to make the
first engagement portion 201 and the second engagement portion 202 engaged
with each other.
Optionally, the trigger further includes connecting rods 205 fixed on the
rotating portion 203, the
connecting rods 205 extend along the axial direction of the rotating portion
203, and the
10 connecting rods 205 are each provided with a contact 204; each lever 208
includes a first raised
portion 220 and a second raised portion 221 connected to the first raised
portion 220, and the first
raised portion 220 and the second raised portion 221 are arranged with an
angle therebetween.
For example, the angle formed between the first raised portion 220 and the
second raised portion
221 is greater than 90 degrees, and the angle may be 120-170 degrees, etc.,
for example, the
15 degree may be 150 degrees or 160 degrees. The each lever 208 further
includes a rotation convex
strip 209, and the rotation convex strip 209 is located substantially at a
junction between the first
raised portion 220 and the second raised portion 221; the rotation convex
strip 209 contacts a
surface of the rear end 116 of the front body 101, and the number of levers
208 is three. The
number of connecting rods 205 is three. The contact 204 has a triangular
structure 308, and an
.. apex angle of the triangular structure 308 abuts against the first raised
portion 220 or the second
raised portion 221. The rotation convex strip 209 may be a cylindrical
structure at least having an
arc surface. When the rotating portion 203 rotates in the first direction, the
apex angle of the
triangular structure on the contact 204 moves from the first raised portion
220 to the second raised
portion 221, wherein due to the action of the arc surface of the rotation
convex strip 209, the first
raised portion 220 and the second raised portion 221 may rotate around the
rotation convex strip
209, in this way, it may be realized that the second engagement portion 202
moves along the
axial direction of the rear body 100, so that the first engagement portion 201
and the second
engagement portion 202 are disengaged from each other.
The present embodiment further provides a drill chuck, which includes a front
body 101, a rear
body 100, clamping jaws 102, and the clutch device in this embodiment; the
rear body 100 can
rotate relative to the front body 101, to make the rear body 100 drive the
clamping jaws 102 to
move, so as to clamp and loosen the drilling tool mounted on the drill chuck;
the first engagement
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16
portion 201 is connected to the front body 101, and the second engagement
portion 202 is
connected to the rear body 100. The drilling tool may be a drill bit, a honing
head, a boring head,
or the like. The front body 101 is provided, in a circumferential direction,
with an accommodating
groove 222 for limiting the connecting rod 205, and the accommodating groove
222 has a groove
.. width greater than the width of the connecting rod 205, then it may be
realized that the connecting
rod 205 rotates by a certain angle with the rotating portion 203, so as to
achieve the purpose of
making the first engagement portion 201 disengaged from or engaged with the
second
engagement portion 202. In order to facilitate rotation of the rotating
portion 203 in the second
direction after realizing the disengagement of the first engagement portion
201 and the second
engagement portion 202 from each other through the rotation of the rotating
portion 203 in the
first direction, a spring groove 223 may be provided in one accommodating
groove 222, a return
spring 118 is installed in the spring groove 223, and one end of the return
spring 118 abuts against
one end of the spring groove 223 in a length direction, the other end of the
return spring 118 abuts
against the connecting rod 205, and an extending direction of the return
spring 118 is
perpendicular to a length direction of the accommodating groove 222; and the
length direction of
the accommodating groove 222 is parallel to the axial direction of the front
body 101. The rotating
portion 203 is of a sleeve-shaped structure, and the sleeve-shaped structure
is sleeved on the
front body 101, and the sleeve-shaped structure is limited by a shaft shoulder
224 on the front
body 101, so as to avoid the sleeve-shaped structure from detaching from the
front body 101.
.. The rear end 116 of the rear body 100 passes through the first engagement
portion 201, and the
rear body 100 and the first engagement portion are arranged with a gap
therebetween. After the
rear end 116 of the rear body 100 passes through the first engagement portion
201, the rear end
116 of the rear body 100 is connected to the second engagement portion 202, so
as to realize
that the rear body 100 and the second engagement portion 202 are relatively
fixed to each other
.. in the circumferential direction, and can be displaced in the axial
direction; after passing through
the second engagement portion 202, the rear end 116 of the rear body 100 is
fixedly connected
to the rear sleeve 121. The rear body 100 has the shaft shoulder 224
configured in such a manner
that the rear body 100 will not leave the front body 101 after the rear end
116 of the rear body
100 passes through the first engagement portion 201. An end surface of the
rear end 116 of the
.. front body 101 is further provided with a rotation groove 210 for allowing
the rotation convex strip
209 to be located therein.
For example, the drill chuck may be a self-tightening drill chuck, and the
self-tightening drill chuck
may be a gear self-tightening drill chuck, a flat jaw self-tightening drill
chuck or an internal thread
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17
self-tightening drill chuck. When the first engagement portion 201 and the
second engagement
portion 202 are disengaged from each other, the forward rotation of the rear
body 100 may realize
the clamping of the drilling tool by the clamping jaws 102, and the reverse
rotation of the rear
body 100 may realize the loosening of the drilling tool from the clamping jaws
102. It should be
.. noted that in this embodiment, the structure allowing the rear body 100 of
the self-tightening drill
chuck to drive the clamping jaws 102 to move and the installation of the
clamping jaws 102 on
the front body 101 are prior art, and are not described in detail in this
embodiment.
Referring to what is shown in FIG_ 12 to FIG_ 19, in this embodiment, the
trigger includes levers
208; the rotation of the rotating portion 203 in the first direction can
enable the levers 208 to pry
the second engagement portion 202 so as to make the second engagement portion
move along
the axial direction of the rear body 100 (i.e., the levers 208 cause the
second engagement portion
202 to move in a direction away from the first engagement portion 201), so
that the first
engagement portion 201 and the second engagement portion 202 are disengaged
from each
other. The rotation of the rotating portion 203 in the second direction can
enable the return elastic
1.5 member 216 to return to an initial position, and enable the second
engagement portion 202 to
move in a direction close to the first engagement portion 201, so as to make
the first engagement
portion 201 and the second engagement portion 202 engaged with each other.
Optionally, the levers 208 are rotatably mounted in the circumferential
direction of the first
engagement portion 201 through the pin shafts 225; the rotating portion 203 is
of a sleeve-shaped
structure, and an inner surface of the sleeve-shaped structure is provided
with protruding blocks
231 configured to push the levers 208 to rotate around the respective pin
shafts 225.
For example, the first engagement portion 201 is provided with a plurality of
avoiding grooves 226
in the circumferential direction thereof, the pin shafts 225 are located on
groove walls of the
respective avoiding grooves 226, and an axial direction of each pin shaft 225
may be parallel to
a radial direction of the rotating portion 203. Each level 208 is provided
with a pin hole 227 for
allowing the corresponding pin shaft 225 to pass therethrough. The lever 208
includes a main
body portion 228 and an additional portion 229, and the pin hole 227 is
located in the main body
portion 228. The additional portion 229 is configured to contact the second
engagement portion
202 so as to pry the second engagement portion 202 so as to make the second
engagement
portion move. When the rotating portion 203 rotates in a direction that the
first engagement portion
201 is disengaged from the second engagement portion 202, the rotating portion
203 applies a
force to the main body portion 228 of each lever 208, the lever 208 rotates
around the pin shaft
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18
225, and an edge of the additional portion 229 abuts against the second
engagement portion 202
so as to achieve the purpose of prying the second engagement portion 202; when
the rotating
portion 203 rotates in a direction of realizing engagement of the first
engagement portion 201 and
the second engagement portion 202 with each other, the second engagement
portion 202 is
.. forced to move in the direction in which the first engagement portion 201
is located due to the
action of the return elastic member 216, and the second engagement portion 202
applies a force
to the additional portion 229, so that the lever 208 is rotated again so that
the lever 208 returns to
the initial position. The number of avoiding grooves 226, the number of levers
208, and the
number of protruding blocks 231 are equal to each other, and all of them may
be three.
The present embodiment further provides a drill chuck, which includes a front
body 101, a rear
body 100, clamping jaws 102, and the clutch device in this embodiment; the
rear body 100 can
rotate relative to the front body 101, so that the rear body 100 can drive the
clamping jaws 102 to
move, so as to clamp or loosen the drilling tool mounted on the drill chuck;
the first engagement
portion 201 is connected to the front body 101, and the second engagement
portion 202 is
connected to the rear body 100. The drilling tool may be a drill bit, a honing
head, a boring head,
or the like. The front body 101 is provided, in a circumferential direction,
with accommodating
grooves 222 for accommodating the levers 208 and the protruding blocks 231,
and the
accommodating grooves 222 each should have a width greater than a sum of a
width of the main
body portion 228 of the lever 208 and a width of the protruding block 231, in
this way, when the
rotating portion 203 rotates, the lever 208 can be enabled to rotate in the
accommodating groove
222, so as to achieve the purpose of making the first engagement portion 201
disengaged from
or engaged with the second engagement portion 202. The rotating portion 203 is
of a sleeve-
shaped structure, and the sleeve-shaped structure is sleeved on the front body
101, and the
sleeve-shaped structure is limited by a shaft shoulder 224 on the front body
101, so as to avoid
the sleeve-shaped structure from detaching from the front body 101. The rear
end 116 of the rear
body 100 passes through the first engagement portion 201, and the rear body
100 and the first
engagement portion are arranged with a gap therebetween. After the rear end
116 of the rear
body 100 passes through the first engagement portion 201, the rear end 116 of
the rear body 100
is connected to the second engagement portion 202, so as to realize that the
rear body 100 and
the second engagement portion 202 are relatively fixed to each other in the
circumferential
direction and can be displaced in the axial direction; after passing through
the second
engagement portion 202, the rear end 116 of the rear body 100 is fixedly
connected to the rear
sleeve 121. The rear body 100 has the shaft shoulder 224 configured in such a
manner that the
Date Recue/Date Received 2021-07-08
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19
rear body 100 will not leave the front body 101 after the rear end 116 of the
rear body 100 passes
through the first engagement portion 201.
For example, the drill chuck may be a self-tightening drill chuck, and the
self-tightening drill chuck
may be a gear self-tightening drill chuck, a flat jaw self-tightening drill
chuck or an internal thread
self-tightening drill chuck. When the first engagement portion 201 and the
second engagement
portion 202 are disengaged from each other, the forward rotation of the rear
body 100 may realize
the clamping of the drilling tool by the clamping jaws 102, and the reverse
rotation of the rear
body 100 may realize the loosening of the drilling tool from the clamping jaws
102. It should be
noted that in this embodiment, the structure in which the rear body 100 of the
self-tightening drill
chuck drives the clamping jaws 102 to move and the installation of the
clamping jaws 102 on the
front body 101 are prior art, and are not described in detail in this
embodiment.
Referring to what is shown in FIG. 20 to FIG. 27, in this embodiment, the
trigger includes levers
208; the rotation of the rotating portion 203 in the first direction can
enable the levers 208 to pry
the second engagement portion 202 so as to make the second engagement portion
move along
the axial direction of the rear body 100 (i.e., the levers 208 causes the
second engagement portion
202 to move in a direction away from the first engagement portion 201), so
that the first
engagement portion 201 and the second engagement portion 202 are disengaged
from each
other. The rotation of the rotating portion 203 in the second direction can
enable the return elastic
member 216 to return to an initial position, and enable the second engagement
portion 202 to
move in a direction close to the first engagement portion 201, so as to make
the first engagement
portion 201 and the second engagement portion 202 engaged with each other. The
rotating
portion 203 is of a sleeve-shaped structure,
Optionally, the first engagement portion 201 is provided with positioning
holes 234, and each lever
208 includes an insertion portion 232 and a prying portion 233; a length
extending direction of the
insertion portion 232 and a length extending direction of the prying portion
233 have an angle
therebetween, the insertion portion 232 is inserted into the corresponding
positioning hole 234,
the rotating portion 203 is of a sleeve-shaped structure, and an inner surface
of the sleeve-shaped
structure is provided with the protruding blocks 231 configured to push the
corresponding insertion
portion 232 to sway in the corresponding positioning hole 234, so as to enable
the prying portion
233 to move.
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For example, the positioning hole 234 may be a rectangular hole, and after the
insertion portion
232 is inserted into the rectangular hole, the insertion portion 232 and the
rectangular hole are in
clearance fit with each other, so that the insertion portion 232 can sway in
the rectangular hole.
The number of positioning holes 234 and the number of levers 208 may be both
plural, for
5 example, three, so that the movement of the second engagement portion 202
may be stable.
When the rotating portion 203 rotates in a direction of realizing
disengagement of the first
engagement portion 201 and the second engagement portion 202 from each other,
the rotating
portion 203 applies a force to the insertion portion 232 of the lever 208, so
that an end portion of
the prying portion 233 is lifted so as to abut against the second engagement
portion 202, thus
10 achieving the purpose of prying the second engagement portion 202; when
the rotating portion
203 rotates in a direction of realizing engagement of the first engagement
portion 201 and the
second engagement portion 202 with each other, the second engagement portion
202 is forced
due to the action of the return elastic member 216 to move in the direction in
which the first
engagement portion 201 is located, and the second engagement portion 202
applies a force to
15 the prying portion 233, so that the lever 208 returns to the initial
position.
The present embodiment further provides a drill chuck, which includes a front
body 101, a rear
body 100, clamping jaws 102, and the clutch device in this embodiment; the
rear body 100 can
rotate relative to the front body 101, so that the rear body 100 can drive the
clamping jaws 102 to
move, so as to clamp or loosen the drilling tool mounted on the drill chuck;
the first engagement
20 portion 201 is connected to the front body 101, and the second
engagement portion 202 is
connected to the rear body 100. The drilling tool may be a drill bit, a honing
head, a boring head,
or the like. The front body 101 is provided, in a circumferential direction,
with accommodating
grooves 222 for accommodating the protruding blocks 231, and the accommodating
grooves 222
each should have a width greater than a width of the protruding block 231, in
this way, when the
rotating portion 203 rotates, the protruding block 231 can be enabled to move
in the
accommodating groove 222, so as to achieve the purpose of disengaging or
engaging the first
engagement portion 201 and the second engagement portion 202. The rotating
portion 203 is of
a sleeve-shaped structure, and the sleeve-shaped structure is sleeved on the
front body 101, and
the sleeve-shaped structure is limited by a shaft shoulder 224 on the front
body 101, avoiding the
sleeve-shaped structure from detaching from the front body 101. The rear end
116 of the rear
body 100 passes through the first engagement portion 201, and the rear body
100 and the first
engagement portion are arranged with a gap therebetween. After the rear end
116 of the rear
body 100 passes through the first engagement portion 201, the rear end 116 of
the rear body 100
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21
is connected to the second engagement portion 202, so as to realize that the
rear body 100 and
the second engagement portion 202 are relatively fixed to each other in the
circumferential
direction, and can be displaced in the axial direction; after passing through
the second
engagement portion 202, the rear end 116 of the rear body 100 is fixedly
connected to the rear
sleeve 121. The rear body 100 has the shaft shoulder 224 configured in such a
manner that the
rear body 100 will not leave the front body 101 after the rear end 116 of the
rear body 100 passes
through the first engagement portion 201.
For example, the drill chuck may he a self-tightening drill chuck, and the
self-tightening drill chuck
may be a gear self-tightening drill chuck, a flat jaw self-tightening drill
chuck or an internal thread
self-tightening drill chuck. When the first engagement portion 201 and the
second engagement
portion 202 are disengaged from each other, the forward rotation of the rear
body 100 may realize
the clamping of the drilling tool by the clamping jaws 102, and the reverse
rotation of the rear
body 100 may realize the loosening of the drilling tool from the clamping jaws
102. It should be
noted that in this embodiment, the structure in which the rear body 100 of the
self-tightening drill
1.5 chuck drives the clamping jaws 102 to move and the installation of the
clamping jaw 102 on the
front body 101 are prior art, and are not described in detail in this
embodiment.
Referring to what is shown in FIG. 28 to FIG. 31, in this embodiment, the
return elastic member
216 is located outside the first engagement portion 216, and the first
engagement portion 201 is
located between the return elastic member 216 and the second engagement
portion 202. The
clutch device further includes an end cap 126, and compression or returning of
the return elastic
member 216 is realized through the rotating portion 203. When the return
elastic member 216 is
located outside the first engagement portion 201, the first engagement portion
201 can move
along the axial direction of the front body 101, and the second engagement
portion 202 is fixedly
connected to the rear body 100; as the front body and the rear body are
coaxially provided, the
axial movement of the first engagement portion along the front body is
equivalent to the axial
movement of the first engagement portion along the rear body.
For example, the end cap 126 includes a disc portion 301 and an axial convex
portion 302
connected to the disc portion 301; the disc portion 301 is fixedly connected
to the front body 101
via screws 111; and the end cap 126 is provided with an axial hole for the
rear end 116 of the rear
body 100 to pass therethrough. The return elastic member 216 is sleeved
outside the axial convex
portion 302 of the end cap 126, and an outer circumferential surface of the
axial convex portion
302 is provided with a plurality of strip-shape grooves 133 extending along an
axial direction of
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22
the axial convex portion 302, an inner wall of an axial hole of the first
engagement portion 201 is
provided with positioning keys 134 cooperating with the respective strip-
shaped grooves 133 on
the axial convex portion 302, and the positioning keys 134 and the hole wall
of the axial hole of
the first engagement portion 201 are of an integral structure, thus, it is
realized that the axial
convex portion 302 and the first engagement portion 201 are relatively fixed
to each other in the
circumferential direction, and can be displaced in the axial direction. The
rear sleeve includes a
sleeve body 309 and a sleeve cover, the sleeve cover and the sleeve body can
be fixedly
connected to each other by means of an interference fit, the second engagement
portion 202 and
the sleeve cover of the rear sleeve 121 are of an integral structure, the rear
end 116 of the rear
body 100, after passing through the axial hole of the axial convex portion
302, is inserted into the
axial hole of the second engagement portion 202, and the rear end 116 of the
rear body 100 and
the second engagement portion 202 are fixedly connected to each other by
interference fit, key
connection, or pin connection. The return elastic member 216 is located
between the disc portion
301 of the end cap 126 and the first engagement portion 201.
In this embodiment, the trigger includes levers 208; the rotation of the
rotating portion 203 in the
first direction can enable the levers 208 to pry the first engagement portion
201 so as to make the
first engagement portion move along the axial direction of the front body 101
(i.e., the levers 208
cause the first engagement portion 201 to move in a direction away from the
second engagement
portion 202, that is, making the first engagement portion move in a direction
close to the rear end
of the front body), so that the first engagement portion 201 and the second
engagement portion
202 are disengaged from each other. The rotation of the rotating portion 203
in the second
direction can enable the return elastic member 216 to return to the initial
position, and enable the
first engagement portion 201 to move in a direction close to the second
engagement portion 202,
so as to make the first engagement portion 201 and the second engagement
portion 202 engaged
with each other. The rotating portion 203 is of a sleeve-shaped structure.
Optionally, the first engagement portion 201 is provided with positioning
holes 234, and each lever
208 includes an insertion portion 232 and a prying portion 233; a length
extending direction of the
insertion portion 232 and a length extending direction of the prying portion
233 have an angle
therebetween, the insertion portion 232 is inserted into the corresponding
positioning hole 234,
the rotating portion 203 is of a sleeve-shaped structure, and an inner surface
of the sleeve-shaped
structure is provided with the protruding blocks 231 configured to push the
respective insertion
portions 232 to sway in the respective positioning holes 234, so as to enable
the prying portion
233 to move.
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23
For example, each positioning hole 234 may be a rectangular hole, and after
the insertion portion
232 is inserted into the rectangular hole, the insertion portion 232 and the
rectangular hole are in
clearance fit with each other, so that the insertion portion 232 can sway in
the rectangular hole.
The number of positioning holes 234 and the number of levers 208 may be both
plural, for
example 3, so that the movement of the first engagement portion 201 may be
stable. When the
rotating portion 203 rotates in a direction of realizing disengagement of the
first engagement
portion 201 and the second engagement portion 202 from each other, the
rotating portion 203
applies a force to the insertion portion 232 of the lever 208, so that one end
of the prying portion
233 abuts against a surface of the second engagement portion 202, the other
end of the prying
portion 233 abuts against a surface of the first engagement portion 201. As
the second
engagement portion 202 is fixedly connected to the rear body 100, and relative
axial displacement
can occur between the first engagement portion 201 and the front body, the
first engagement
portion is enabled to move in the direction towards the rear end of the front
body since the second
engagement portion 202 is stationary and the first engagement portion 201 is
pressed against the
first engagement portion 201 under the action of the other end of the prying
portion 233; when
the rotating portion 203 rotates in a direction of realizing engagement
between the first
engagement portion 201 and the second engagement portion 202, the first
engagement portion
201 is forced due to the action of the return elastic member 216 to move in
the direction in which
the second engagement portion 202 is located, and the first engagement portion
201 applies a
.. force to the prying portion 233, so as to make the lever 208 return to the
initial position.
The present embodiment further provides a drill chuck, which includes a front
body 101, a rear
body 100, clamping jaws 102, and the clutch device in this embodiment; the
rear body 100 can
rotate relative to the front body 101, so that the rear body 100 can drive the
clamping jaws 102 to
move, so as to clamp or loosen the drilling tool mounted on the drill chuck;
the first engagement
portion 201 is connected to the front body 101, and the second engagement
portion 202 is
connected to the rear body 100. The drilling tool may be a drill bit, a honing
head, a boring head,
or the like. The front body 101 is provided, in a circumferential direction,
with accommodating
grooves 222 for accommodating the protruding blocks 231, and each
accommodating groove 222
should have a width greater than a sum of a width of the protruding block 231
and a width of the
insertion portion, in this way, when the rotating portion 203 rotates, each
protruding block 231 can
be enabled to move in the corresponding accommodating groove 222 and the
insertion portion is
made to sway in the corresponding accommodating groove, so as to achieve the
purpose of
disengaging or engaging the first engagement portion 201 and the second
engagement portion
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24
202. The rotating portion 203 is of a sleeve-shaped structure, and the sleeve-
shaped structure is
sleeved over the front body 101, and the sleeve-shaped structure is limited by
a shaft shoulder
224 on the front body 101, avoiding the sleeve-shaped structure from detaching
from the front
body 101. The rear end 116 of the rear body 100 passes through an axial hole
of an axial convex
portion 302 of an end cap 126, and the rear body 100 and the axial convex
portion 302 are
arranged with a gap therebetween. After the rear end 116 of the rear body 100
passes through
the axial hole of the axial convex portion 302 of the end cap 126, the rear
end 116 of the rear
body 100 is connected to the second engagement portion 202, so as to realize
that the rear body
100 and the second engagement portion 202 can be fixedly connected to each
other. The rear
body 100 has the shaft shoulder 224 configured in such a manner that the rear
body 100 will riot
leave the front body 101 after the rear end 116 of the rear body 100 passes
through the axial hole
of the axial convex portion 302, and relative axial displacement substantially
will not occur
between the rear body 100 and the front body 101. The disc portion 301 of the
end cap 126 is
provided, in a circumferential direction, with a plurality of avoiding grooves
226 for avoiding the
insertion portions of the levers, and a width of each avoiding groove 226 is
substantially equal to
a width of the accommodating groove 222, thus the swaying of the insertion
portion is not affected.
For example, the drill chuck may be a self-tightening drill chuck, and the
self-tightening drill chuck
may be a gear self-tightening drill chuck, a flat jaw self-tightening drill
chuck or an internal thread
self-tightening drill chuck, and in this embodiment, the self-tightening drill
chuck being a gear self-
tightening drill chuck is taken as an example. When the first engagement
portion 201 and the
second engagement portion 202 are disengaged from each other, the forward
rotation of the rear
body 100 may realize the clamping of the drilling tool by the clamping jaws
102, and the reverse
rotation of the rear body 100 may realize the loosening of the drilling tool
from the clamping jaws
102. It should be noted that in this embodiment, the structure in which the
rear body 100 of the
self-tightening drill chuck drives the clamping jaws 102 to move and the
installation of the clamping
jaws 102 on the front body 101 are prior art, and are not described in detail
in this embodiment.
Referring to what is shown in FIG. 32 to FIG. 38, in this embodiment, the
return elastic member
216 is located outside the first engagement portion 216, and the first
engagement portion 201 is
located between the return elastic member 216 and the second engagement
portion 202. The
clutch device further includes an end cap 126, and compression or returning of
the return elastic
member 216 is realized through the rotating portion 203. When the return
elastic member 216 is
located outside the first engagement portion 201, the first engagement portion
201 can move
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along the axial direction of the front body 101, and the second engagement
portion 202 is fixedly
connected to the rear body 100.
For example, the end cap 126 includes a disc portion 301 and an axial convex
portion 302
connected to the disc portion 301; the disc portion 301 is fixedly connected
to the front body 101
5 via screws 111; and the end cap 126 is provided with an axial hole for
the rear end 116 of the rear
body 100 to pass therethrough. The return elastic member 216 is sleeved
outside the axial convex
portion 302 of the end cap 126, and an outer circumferential surface of the
axial convex portion
302 is provided with a plurality of strip-shape grooves 133 extending along an
axial direction of
the axial convex portion 302, an inner wall of an axial hole of the first
engagement portion 201 is
10 provided with positioning keys 134 cooperating with the strip-shaped
grooves 133 on the axial
convex portion 302, and the positioning keys 134 and the hole wall of the
axial hole of the first
engagement portion 201 are of an integral structure, thus, it is realized that
the axial convex
portion 302 and the first engagement portion 201 are relatively fixed to each
other in the
circumferential direction, and can be displaced in the axial direction. The
rear sleeve includes a
1.5 sleeve body 309 and a sleeve cover, the sleeve cover and the sleeve
body can be fixedly
connected to each other by means of an interference fit, the second engagement
portion 202 and
the sleeve cover of the rear sleeve 121 are of an integral structure, the rear
end 116 of the rear
body 100, after passing through the axial hole of the axial convex portion
302, is inserted into the
axial hole of the second engagement portion 202, and the rear end 116 of the
rear body 100 and
20 the second engagement portion 202 are fixedly connected to each other by
interference fit, key
connection, pin connection. The return elastic member 216 is located between
the disc portion
301 of the end cap 126 and the first engagement portion 201.
Optionally, the trigger includes connecting rods 205 fixed on the rotating
portion 203, and each
connecting rod 205 extends along the axial direction of the rotating portion
203, and the each
25 connecting rod 205 is provided with a contact 204; contact sockets 235
are provided in a surface
of the first engagement portion 201; and each contact 204 can enter or leave
the corresponding
contact socket 235 along with the rotation of the rotating portion 203.
For example, the rotating portion 203 is of a sleeve-shaped structure, and an
extending direction
of the connecting rod 205 is parallel to an axial direction of the sleeve-
shaped structure. One end
of each connecting rod 205 is connected to the sleeve-shaped structure, and
the other end of the
each connecting rod 205 is provided with the contact 204, and the contact 204
at least has a first
arc surface 236; and the contact pocket 235 is located on an inner side
surface 132 of the first
Date Recue/Date Received 2021-07-08
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26
engagement portion 201. The contact socket 235 has a second arc surface
matching the first arc
surface 236 on the contact 204, that is, a bottom of the contact socket 235 is
of an arc surface
structure. When the rotating portion 203 rotates in a direction of realizing
disengagement of the
first engagement portion 201 and the second engagement portion 202 from each
other, the
connecting rod 205 rotates with the rotating portion 203, and the contact 204
on the connecting
rod 206 leaves the contact socket 236, then the contact 204 abuts against the
inner side surface
132 of the first engagement portion 201, in this way, the contacts 204 can
enable the first
engagement portion 201 to move, and the first engagement portion 201
compresses the return
elastic member 216 again, so as to achieve the purpose that the first
engagement portion 201 is
disengaged from the second engagement portion 202; when the rotating portion
203 rotates in a
direction of realizing engagement between the first engagement portion 201 and
the second
engagement portion 202, the connecting rods 205 rotates with the rotating
portion 203, the
contacts 204 on the connecting rods 205 then enter the respective contact
sockets 235, and the
return elastic member 216 can enable the first engagement portion 201 to move
in a direction in
which the second engagement portion 202 is located, so as to achieve the
purpose of engaging
the second engagement portion 202 with the first engagement portion 201.
The present embodiment further provides a drill chuck, which includes a front
body 101, a rear
body 100, clamping jaws 102, and the clutch device in this embodiment; the
rear body 100 can
rotate relative to the front body 101, so that the rear body 100 can drive the
clamping jaws 102 to
move, so as to clamp or loosen the drilling tool mounted on the drill chuck;
the first engagement
portion 201 is connected to the front body 101, and the second engagement
portion 202 is
connected to the rear body 100. The drilling tool may be a drill bit, a honing
head, a boring head,
or the like. The front body 101 is provided, in a circumferential direction,
with a plurality of
accommodating grooves 222 for limiting the connecting rods 205, and the
accommodating
grooves 222 each should have a width greater than that of the connecting rod
205, in this way,
when the rotating portion 203 rotates, the connecting rod 205 can have a
rotation angle in the
corresponding accommodating groove 222, so as to achieve the purpose of
disengaging or
engaging the first engagement portion 201 and the second engagement portion
202. The rotating
portion 203 is sleeved over the front body 101, and the sleeve-shaped
structure is limited by a
shaft shoulder 224 on the front body 101, avoiding the sleeve-shaped structure
from detaching
from the front body 101. The rear end 116 of the rear body 100 passes through
the first
engagement portion 201, and the rear body 100 and the first engagement portion
are arranged
with a gap therebetvveen, so as to ensure that the rear body 100 can rotate
relative to the first
Date Recue/Date Received 2021-07-08
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27
engagement portion 201. The rear body 100 has the shaft shoulder 224
configured in such a
manner that the rear body 100 will not leave the front body 101 after the rear
end 116 of the rear
body 100 passes through the first engagement portion 201.
For example, the drill chuck may be a self-tightening drill chuck, and the
self-tightening drill chuck
may be a gear self-tightening drill chuck, a flat jaw self-tightening drill
chuck or an internal thread
self-tightening drill chuck. When the first engagement portion 201 and the
second engagement
portion 202 are disengaged from each other, the forward rotation of the rear
body 100 may realize
the clamping of the drilling tool by the clamping jaws 102, and the reverse
rotation of the rear
body 100 may realize the loosening of the drilling tool from the clamping jaws
102. It should be
noted that in this embodiment, the structure in which the rear body 100 of the
self-tightening drill
chuck drives the clamping jaws 102 to move and the installation of the
clamping jaw 102 on the
front body 101 are prior art, and are not described in detail in this
embodiment.
Referring to what is shown in FIG. 39 to FIG. 47, in this embodiment, the
return elastic member
216 is located outside the first engagement portion 216, and the first
engagement portion 201 is
located between the return elastic member 216 and the second engagement
portion 202. The
clutch device further includes an end cap 126, and compression or returning of
the return elastic
member 216 is realized through the rotating portion 203. When the return
elastic member 216 is
located outside the first engagement portion 201, the first engagement portion
201 can move
along the axial direction of the front body 101, and the second engagement
portion 202 is fixedly
connected to the rear body 100
For example, the end cap 126 includes a disc portion 301 and an axial convex
portion 302
connected to the disc portion 301; the disc portion 301 is fixedly connected
to the front body 101
via screws 111; and the end cap 126 is provided with an axial hole for the
rear end 116 of the rear
body 100 to pass therethrough. The return elastic member 216 is sleeved
outside the axial convex
portion 302 of the end cap 126, and an outer circumferential surface of the
axial convex portion
302 is provided with a plurality of strip-shape grooves 133 extending along an
axial direction of
the axial convex portion 302, an inner wall of an axial hole of the first
engagement portion 201 is
provided with positioning keys 134 cooperating with the strip-shaped grooves
133 on the axial
convex portion 302, and each positioning key 134 and the hole wall of the
axial hole of the first
engagement portion 201 are of an integral structure, thus it is realized that
the axial convex portion
302 and the first engagement portion 201 are relatively fixed to each other in
the circumferential
direction, and can be displaced in the axial direction. The rear sleeve
includes a sleeve body 309
Date Recue/Date Received 2021-07-08
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28
and a sleeve cover, the sleeve cover and the sleeve body can be fixedly
connected to each other
by means of an interference fit, the second engagement portion 202 and the
sleeve cover of the
rear sleeve 121 are of an integral structure, the rear end 116 of the rear
body 100 is inserted,
after passing through the axial hole of the axial convex portion 302, into the
axial hole of the
.. second engagement portion 202, and the rear end 116 of the rear body 100
and the second
engagement portion 202 are fixedly connected to each other by interference
fit, key connection,
or pin connection. The return elastic member 216 is located between the disc
portion 301 of the
end cap 126 and the first engagement portion 201. The rear body 100 has the
shaft shoulder 224
configured in such a manner that the rear body 100 will not leave the front
body 101 after the rear
end 116 of the rear body 100 passes through the end cap 126.
Optionally, the trigger includes a follower portion 310 and connecting rods
205 fixed on the
follower portion 310, each connecting rod 205 extends along the axial
direction of the follower
portion 310, and the each connecting rod 205 is provided with a contact 204;
the follower portion
310 and the rotating portion 203 are in threaded transmission with each other;
connecting rod
.. guide grooves are provided in the circumferential direction of the front
body 101 for enabling the
connecting rods 205 to move along the length extending direction of the
connecting rod guide
groove.
For example, the rotating portion 203 is of a sleeve-shaped structure, and an
extending direction
of each connecting rod 205 is parallel to an axial direction of the sleeve-
shaped structure. The
follower portion 310 is of a sleeve-shape. The inner wall of the axial hole of
the rotating portion
203 has an internal thread 303, and an outer surface of the follower portion
310 has an external
thread 304 matching the internal thread on the rotating portion 203. When the
rotating portion 203
rotates in a direction of realizing disengagement of the first engagement
portion 201 and the
second engagement portion 202 from each other, the rotating portion 203 and
the follower portion
310 are in threaded transmission with each other, the contact 204 on each
connecting rod 205 of
the follower portion 310 applies a force to the first engagement portion 201,
so that the first
engagement portion 201 compresses the return elastic member 210, so as to
achieve the purpose
of disengaging the first engagement portion 201 and the second engagement
portion 202 from
each other; when the rotating portion 203 rotates in the direction of
realizing engagement between
.. the first engagement portion 201 and the second engagement portion 202, the
return elastic
member 216 enables the first engagement portion 201 to move in the direction
in which the
second engagement portion 202 is located, so as to achieve the purpose of
engaging the second
engagement portion 202 and the first engagement portion 201 with each other.
Date Recue/Date Received 2021-07-08
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29
The present embodiment further provides a drill chuck, which includes a front
body 101, a rear
body 100, clamping jaws 102, and the clutch device in this embodiment; the
rear body 100 can
rotate relative to the front body 101, so that the rear body 100 can drive the
clamping jaws 102 to
move, so as to clamp or loosen the drilling tool mounted on the drill chuck;
the first engagement
portion 201 is connected to the front body 101, and the second engagement
portion 202 is
connected to the rear body 100. The drilling tool may be a drill bit, a honing
head, a boring head,
or the like. The front body 101 is provided, in the circumferential direction,
with a plurality of
accommodating grooves 222 for limiting the connecting rods 205, so that the
follower portion 310
moves along the axial direction of the front body 101, in this way, when the
rotating portion 203
rotates, the follower portion 310 moves along the axial direction of the front
body 101, and the
contacts 204 on the follower part 310 can compress or release the return
elastic member 216, so
as to achieve the purpose of disengaging or engaging the first engagement
portion 201 and the
second engagement portion 202. The rotating portion 203 is sleeved over the
front body 101, the
front end 115 of the front body 101 is fixed with a fixing sleeve 305, a
surface of of the fixing
sleeve 305 facing a rear end 116 of the front body 101 is provided with a
first arc protrusion 306,
and a second arc protrusion 307 matching the first arc protrusion 306 is
provided on an inner wall
of an axial hole of the rotating portion 203, so as to limit the rotation
angle of the rotating portion
203, that is, making the rotation angle of the rotating portion 203 within a
set range. The fixing
sleeve 305 and the front end 115 of the front body 101 may be fixedly
connected to each other
by means of an interference fit or screws 111, and the fixing sleeve 305 may
also be used to
prevent the rotating portion 203 from leaving the front end 115 of the front
body 101. When the
rotating portion 203 rotates a certain rotation angle in the first direction,
one end of the second
arc protrusion 307 is stopped by one end of the first arc protrusion 306; when
the rotating portion
203 rotates a certain rotation angle in the second direction, the other end of
the second arc
protrusion 307 is stopped by the other end of the first arc protrusion 306.
The rear end 116 of the
rear body 100 passes through the first engagement portion 201, and the rear
body 100 and the
first engagement portion are arranged with a gap therebetween, so as to ensure
that the rear
body 100 can rotate relative to the first engagement portion 201; the rear
body 100 has a shaft
shoulder 224 configured in such a manner that the rear body 100 will not leave
the front body 101
after the rear end 116 of the rear body 100 passes through the first
engagement portion 201.
For example, the drill chuck may be a self-tightening drill chuck, and the
self-tightening drill chuck
may be a gear self-tightening drill chuck, a flat jaw self-tightening drill
chuck or an internal thread
self-tightening drill chuck. When the first engagement portion 201 and the
second engagement
Date Recue/Date Received 2021-07-08
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portion 202 are disengaged from each other, the forward rotation of the rear
body 100 may realize
the clamping of the drilling tool by the clamping jaws 102, and the reverse
rotation of the rear
body 100 may realize the loosening of the drilling tool from the clamping jaws
102. It should be
noted that in this embodiment, the structure in which the rear body 100 of the
self-tightening drill
5 chuck drives the clamping jaw 102 to move and the installation of the
clamping jaws 102 on the
front body 101 are prior art, and are not described in detail in this
embodiment.
An embodiment of the present disclosure provides a power tool, which includes
a driving shaft
and a drill chuck, and the drill chuck may be the drill chuck provided in the
above embodiments;
and the driving shaft is connected to the rear body 100 for driving the rear
body 100 to rotate. The
10 rear body 100 also has an axial threaded hole or a tapered hole for
connection with the driving
shaft.
Finally, it should be indicated that the various embodiments above are merely
used for illustrating
the technical solutions of the present disclosure, rather than limiting the
present disclosure. While
the detailed description is made to the present disclosure with reference to
the various preceding
15 embodiments, those ordinarily skilled in the art should understand that
they still could modify the
technical solutions recited in the various preceding embodiments, or make
equivalent
substitutions to some or all of the technical features therein. These
modifications or substitutions
do not make the essence of the corresponding technical solutions depart from
the scope of the
technical solutions of the various embodiments of the present disclosure. In
the description
20 provided herein, numerous specific details are described.
Industrial Applicability
The clutch device, the drill chuck, the power tool, and the bidirectional
rotation method of the drill
chuck provided in the present disclosure advantageously ensure the drilling
tool on the drill chuck
to have mounting stability, avoid the occurrence of loosening or detachment,
and also realize the
25 bidirectional rotation of the drill chuck, so as to drive the drilling
tool to perform bidirectional
operation, and may allow more reliable, easy, simple, and convenient
replacement of the drilling
tool
Date Recue/Date Received 2021-07-08
